Quick, Controlled Synthesis of Ultrathin Bi<sub>2</sub>Se<sub>3</sub> Nanodiscs and Nanosheets

Min, Yuho; Moon, Geon Dae; Kim, Bong Soo; Lim, Byungkwon; Kim, Jin Sang; Kang, Chong Yun; Jeong, Unyong

doi:10.1021/ja209991z

Cited by 159 publications

(137 citation statements)

References 22 publications

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“…As shown in Figure 1e, all the peaks can be indexed to the rhombohedral phase of Bi 2 Se 3 . 48 Compared to the bare Bi 2 Se 3 NSs (see Supplementary Figure S1A, B) surface modification does not change the morphology and structure of the Bi 2 Se 3 NSs. The zeta potentials shown in Figure 1f provide direct evidence of the modification of the Bi 2 Se 3 NSs.…”

Section: Resultsmentioning

confidence: 85%

“…The high-resolution transmission electron microscopy image presented in Figure 1c shows hexagonal lattice fringes with 0.21 nm spacing corresponding to the (110) plane of the Bi 2 Se 3 crystal. 48 The AFM image in Figure 1d shows heights of 2.18 and 2.07 nm, corresponding to a stack of~2 quantum layers (QLs) of Bi 2 Se 3 . The NSs are further characterized by powder XRD.…”

Section: Resultsmentioning

confidence: 99%

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Decorated ultrathin bismuth selenide nanosheets as targeted theranostic agents for in vivo imaging guided cancer radiation therapy

et al. 2017

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An efficient radiotherapeutic agent is synthesized using ultrathin two-dimensional 30-nm-wide and 2-nm-thick Bi 2 Se 3 nanosheets (NSs) as a radiosensitizer. Chitosan (CS) and RGD peptide are employed to enhance the radiotherapy efficiency and biocompatibility. The Bi 2 Se 3 -CS-RGD NSs exhibit excellent targeting ability to αvβ3 integrin-overexpressing cancer cells and potent radiosensitization efficiency with high stability. Detailed in vitro experiments show that the Bi 2 Se 3 -CS-RGD NSs enhance the sensitivity of HeLa cells to X-ray-induced cell death by inhibiting TrxR activities and activating downstream reactive oxygen species-mediated signaling pathways. In vivo experiments using intravenous or intratumor injection demonstrate that the Bi 2 Se 3 -CS-RGD NSs are more efficient tumor growth inhibitors compared to bare Bi 2 Se 3 NSs. The multifunctionality of the NSs enables the use of photoacoustic imaging and magnetic resonance imaging to examine their targeting ability and therapeutic effects, respectively. In addition, the RGD-decorated Bi 2 Se 3 NSs show much better in vivo biocompatibility and can be efficiently expelled from the body after 48 h post injection. This study reveals an effective and safe theranostic agent for next-generation cancer radiotherapy.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Decorated ultrathin bismuth selenide nanosheets as targeted theranostic agents for in vivo imaging guided cancer radiation therapy

et al. 2017

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“…In recent years, significant efforts have been devoted to controlling the crystal morphology of TIs567, extending their applications in the electronics and optoelectronics fields8910, and improving their performance in thermoelectric devices1112.…”

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confidence: 99%

Ultra-broadband Nonlinear Saturable Absorption for Two-dimensional Bi2TexSe3−x Nanosheets

Wang

Liu

Yuan

et al. 2016

Sci Rep

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We report the ultra-broadband nonlinear optical (NLO) response of Bi2TexSe3−x nanosheets produced by a facile solvothermal method. Our result show that the extracted basic optical nonlinearity parameters of Bi2TexSe3−x nanosheets, αNL, Imχ(3), and FOM reach ~104 cm/GW, ~10−8 esu and ~10−13 esu cm, respectively, which are several orders of magnitude larger than those of bulk dielectrics. We further observed the excitation intensity dependence of the NLO absorption coefficient and the NLO response sensitivity. The mechanisms of those phenomena were proposed based on physical model. The wavelength dependence of the NLO response of Bi2TexSe3−x nanosheets was investigated, and we determined that the Bi2TexSe3−x nanosheets possess an ultra-broadband nonlinear saturable absorption property covering a range from the visible to the near-infrared band, with the NLO absorption insensitive to the excitation wavelength. This work provide fundamental and systematic insight into the NLO response of Bi2TexSe3−x nanosheets and support their application in photonic devices in the future.

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“…In our synthesis, Bi 2 Se 3 nanosheets (NSs) with two different surface compositions are used as seeds 20 for the heterogeneous nucleation and growth of CdS nanoparticles (NPs). The details of the syntheses are described in the Supplementary Information.…”

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confidence: 99%

Colloidal 2D–0D Lateral Nanoheterostructures: A Case Study of Site-Selective Growth of CdS Nanodots onto Bi₂Se₃ Nanosheets

Li²,

Yang³

et al. 2015

Nano Lett.

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Two-dimensional (2D) nanoheterostructure (2D NHS) with nanoparticles grown on 2D nanomaterial substrates could potentially enable many novel functionalities. Controlled site-selective growth of nanoparticles on either the lateral or the basal directions of 2D nanomaterial substrates is desirable but extremely challenging. Herein, we demonstrate the rational control of lateral- and basal-selective attachment of CdS nanoparticles onto 2D Bi2Se3 nanosheets through solution phase reactions. The combination of experimental and theoretical efforts elucidate that site-relevant interfacial bonding and kinetic control of molecular precursors play vital roles for site selectivity. Furthermore, the electronic structures revealed from density functional theory calculations explain the superior performance of the lateral 2D NHSs compared to their basal counterpart in prototype photoelectrochemical cells. The present study will inspire the construction of other site-selective 2D NHSs with well-defined structure and unique properties.

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Quick, Controlled Synthesis of Ultrathin Bi₂Se₃ Nanodiscs and Nanosheets

Cited by 159 publications

References 22 publications

Decorated ultrathin bismuth selenide nanosheets as targeted theranostic agents for in vivo imaging guided cancer radiation therapy

Decorated ultrathin bismuth selenide nanosheets as targeted theranostic agents for in vivo imaging guided cancer radiation therapy

Ultra-broadband Nonlinear Saturable Absorption for Two-dimensional Bi2TexSe3−x Nanosheets

Colloidal 2D–0D Lateral Nanoheterostructures: A Case Study of Site-Selective Growth of CdS Nanodots onto Bi₂Se₃ Nanosheets

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Quick, Controlled Synthesis of Ultrathin Bi2Se3 Nanodiscs and Nanosheets

Cited by 159 publications

References 22 publications

Decorated ultrathin bismuth selenide nanosheets as targeted theranostic agents for in vivo imaging guided cancer radiation therapy

Decorated ultrathin bismuth selenide nanosheets as targeted theranostic agents for in vivo imaging guided cancer radiation therapy

Ultra-broadband Nonlinear Saturable Absorption for Two-dimensional Bi2TexSe3−x Nanosheets

Colloidal 2D–0D Lateral Nanoheterostructures: A Case Study of Site-Selective Growth of CdS Nanodots onto Bi2Se3 Nanosheets

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Product

Resources

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Quick, Controlled Synthesis of Ultrathin Bi₂Se₃ Nanodiscs and Nanosheets

Colloidal 2D–0D Lateral Nanoheterostructures: A Case Study of Site-Selective Growth of CdS Nanodots onto Bi₂Se₃ Nanosheets